$147.25 34 Liter Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) quantity Add to cart SKU: GFX34-155-5300-I Category: Gas Cylinders Description Description H2S 25 ppm/ CO 100 ppm/ CH4 2.5% (50% LEL)/ O2 18.0%/ N2 Related products Sale! Carbon Monoxide (CO) Calibration Gas – 50 ppm & 100 ppm – 103L Cylinder $115.00 Original price was: $115.00.$109.25Current price is: $109.25. Select options This product has multiple variants. The options may be chosen on the product page Ammonia (NH₃) Calibration Gas $304.00 Select options This product has multiple variants. The options may be chosen on the product page Hydrogen (H₂) Calibration Gas – 50% LEL – 103L Cylinder $95.00 Add to cart Nitrogen (N₂) Calibration Gas – 99.999% Purity – 103L Cylinder $95.00 Add to cart